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Finding the Fourth Proportional to 526.44, 726.90 and 428.04

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Solution

The fourth proportional to 526.44, 726.90 and 428.04 is: 591.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.44 : 726.90 = 428.04 : x
  2. Step 2: Convert to fraction form
    526.44/726.90 = 428.04/x
  3. Step 3: Cross multiply
    526.44x = 726.90 × 428.04
  4. Step 4: Simplify right side
    526.44x = 311,142.28
  5. Step 5: Solve for x
    x = 311,142.28/526.44
  6. Step 6: Final answer
    x = 591.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.